Computer Hardware Servicing

Cyber security or information technology security are the techniques of protecting computers, networks, programs and data from unauthorized access or attacks that are aimed for exploitation. ... Network security includes activities to protect the usability, reliability, integrity and safety of the network.

Complete Ethical Hacking...

1.What is the sys-id-ext field in a BPDU used for?

A. It is a 4-bit field inserted into an Ethernet frame to define trunking information between switches.
B. It is a 12-bit field inserted into an Ethernet frame to define VLANs in an STP instance.
C. It is a 4-bit field inserted into an non-Ethernet frame to define EtherChannel options.
D. It is a 12-bit field inserted into an Ethernet frame to define STP root bridges.

2. You have four RSTP PVST+ links between switches and want to aggregate the band-width. What solution will you use?

A.EtherChannel
B. PortFast
C. BPDU Channel
D. VLANs
E. EtherBundle

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VPNs, or Virtual Private Networks, allow users to securely access a private network and share data remotely through public networks. Much like a firewall protects your data on your computer, VPNs protect it online.

Port Address Translation (PAT), is an extension to network address translation (NAT) that permits multiple devices on a local area network (LAN) to be mapped to a single public IP address. The goal of PAT is to conserve IP addresses.

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